将400.000条记录写入文件时出现"System.OutOfMemoryException"

using System;
using System.IO;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        int batchSize = 10000;
        int totalRecords = 400000;
        int numBatches = (int)Math.Ceiling((double)totalRecords / batchSize);

        for (int i = 0; i < numBatches; i++)
        {
            string[] records = GenerateRecords(batchSize);
            WriteRecordsToFile(records, $"batch_{i}.txt");
        }
    }

    static string[] GenerateRecords(int numRecords)
    {
        return Enumerable.Range(1, numRecords).Select(x => $"Record {x}").ToArray();
    }

    static void WriteRecordsToFile(string[] records, string fileName)
    {
        using (StreamWriter writer = new StreamWriter(fileName))
        {
            foreach (string record in records)
            {
                writer.WriteLine(record);
            }
        }
    }
}